Comparative effects of gibberellins and an N-substituted phthalimide on seed germination and extension growth of celery (Apium graveolens L.)

Gott, Kathleen A.; Thomas, T. H.

doi:10.1007/bf00028170

Cited by 9 publications

(7 citation statements)

References 4 publications

(8 reference statements)

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“…Modifications to this should be relatively easy to implement . Secondly use of the N-substituted phthalimide (1-(3-chlorophthalimido)-cyclo hexane carboxamide) may avoid the detrimental side effects of gibberellins [10] . Paradoxically, although it may now be possible to introduce such treatments, their benefit may have decreased as seed vigour has increased [13,3] .…”

Section: Introductionmentioning

confidence: 99%

Sugar-beet seed steep treatments to improve germination under cold, wet conditions

Durrant¹,

Mash²

1991

Plant Growth Regul

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Modifying the present commercial sugar-beet steep treatment (12 h in 0 .2% thiram suspension, 25 °C) to include an initial 2 h steep in 0 .3 M hydrochloric acid, decreased fruit weight and cortex density and improved the performance of the inherently slower part of the population under cold, wet conditions . Adding gibberellins (GA4,7 ) or an N-substituted phthalimide (AC 94377) to the thiram steep was also beneficial whereas kinetin of N6-benzyladenine gave no improvement . Germination was even more rapid and better synchronised following a 4-day seed advancement sequence, particularly when this started with the acid steep . Overall, it was possible to increase the proportion of seeds which gave a root or produced hypocotyls at least 2cm tall by 9% and 14% respectively ; the thermal time needed for the 90th seed to germinate was reduced from 73 to 30 day degrees and synchrony could be improved at least two-fold .

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Section: Introductionmentioning

confidence: 99%

Sugar-beet seed steep treatments to improve germination under cold, wet conditions

Durrant¹,

Mash²

1991

Plant Growth Regul

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“…AC 94,377 promotes growth, Tlowering, and alterations in plant sex expression [10,12,[16][17][18][19], and it is also active in a number oT gibberellin-bioassay systems [10,18] . In addition, germination and emergence oT dormant weed [2,11] and celery seed [4] are enhanced by AC 94,377, suggesting potential utility in agricultural applications . In addition, germination and emergence oT dormant weed [2,11] and celery seed [4] are enhanced by AC 94,377, suggesting potential utility in agricultural applications .…”

Section: Introductionmentioning

confidence: 99%

Control of early seedling growth in varietal lines of hexaploid wheat (Triticum aestivum), durum wheat (Triticum durum), and barley (Hordeum vulgare) in response to the phthalimide growth regulant, AC 94,377

Rodaway¹,

Gates²,

Brindle³

1991

Plant Growth Regul

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“…S11). Our study suggests that the biological activities of AC94377 differ from that of GA in many plants (Gott and Thomas, 1986), which may be attributable to the GID1 subtype selectivity of AC94377.…”

Section: Ac94377 Preferentially Binds Gid1c To Mimic Ga Activitymentioning

confidence: 79%

Substituted Phthalimide AC94377 Is a Selective Agonist of the Gibberellin Receptor GID1

et al. 2016

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ORCID IDs: 0000-0001-9901-5293 (K.J.); 0000-0003-0774-6203 (T.A.).Gibberellin (GA) is a major plant hormone that regulates plant growth and development and is widely used as a plant growth regulator in agricultural production. There is an increasing demand for function-limited GA mimics due to the limitations on the agronomical application of GA to crops, including GA's high cost of producing and its leading to the crops' lodging. AC94377, a substituted phthalimide, is a chemical that mimics the growth-regulating activity of GAs in various plants, despite its structural difference. Although AC94377 is widely studied in many weeds and crops, its mode of action as a GA mimic is largely unknown. In this study, we confirmed that AC94377 displays GA-like activities in Arabidopsis (Arabidopsis thaliana) and demonstrated that AC94377 binds to the Arabidopsis GIBBERELLIN INSENSITIVE DWARF1 (GID1) receptor (AtGID1), forms the AtGID1-AC94377-DELLA complex, and induces the degradation of DELLA protein. Our results also indicated that AC94377 is selective for a specific subtype among three AtGID1s and that the selectivity of AC94377 is attributable to a single residue at the entrance to the hydrophobic pocket of GID1. We conclude that AC94377 is a GID1 agonist with selectivity for a specific subtype of GID1, which could be further developed and used as a function-limited regulator of plant growth in both basic study and agriculture.

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Comparative effects of gibberellins and an N-substituted phthalimide on seed germination and extension growth of celery (Apium graveolens L.)

Cited by 9 publications

References 4 publications

Sugar-beet seed steep treatments to improve germination under cold, wet conditions

Sugar-beet seed steep treatments to improve germination under cold, wet conditions

Control of early seedling growth in varietal lines of hexaploid wheat (Triticum aestivum), durum wheat (Triticum durum), and barley (Hordeum vulgare) in response to the phthalimide growth regulant, AC 94,377

Substituted Phthalimide AC94377 Is a Selective Agonist of the Gibberellin Receptor GID1

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